//
// ScopedUnlock.h
//
// $Id: //poco/1.4/Foundation/include/Poco/ScopedUnlock.h#2 $
//
// Library: Foundation
// Package: Threading
// Module:  Mutex
//
// Definition of the ScopedUnlock template class.
//
// Copyright (c) 2007, Applied Informatics Software Engineering GmbH.
// and Contributors.
//
// Permission is hereby granted, free of charge, to any person or organization
// obtaining a copy of the software and accompanying documentation covered by
// this license (the "Software") to use, reproduce, display, distribute,
// execute, and transmit the Software, and to prepare derivative works of the
// Software, and to permit third-parties to whom the Software is furnished to
// do so, all subject to the following:
// 
// The copyright notices in the Software and this entire statement, including
// the above license grant, this restriction and the following disclaimer,
// must be included in all copies of the Software, in whole or in part, and
// all derivative works of the Software, unless such copies or derivative
// works are solely in the form of machine-executable object code generated by
// a source language processor.
// 
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
// SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
// FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
// ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
// DEALINGS IN THE SOFTWARE.
//


#ifndef Foundation_ScopedUnlock_INCLUDED
#define Foundation_ScopedUnlock_INCLUDED


#include "Poco/Foundation.h"


namespace Poco {


template <class M>
class ScopedUnlock
	/// A class that simplifies thread synchronization
	/// with a mutex.
	/// The constructor accepts a Mutex and unlocks it.
	/// The destructor locks the mutex.
{
public:
	inline ScopedUnlock(M& mutex, bool unlockNow = true): _mutex(mutex)
	{
		if (unlockNow)
			_mutex.unlock();
	}
	inline ~ScopedUnlock()
	{
		try
		{
			_mutex.lock();
		}
		catch (...)
		{
			poco_unexpected();
		}
	}

private:
	M& _mutex;

	ScopedUnlock();
	ScopedUnlock(const ScopedUnlock&);
	ScopedUnlock& operator = (const ScopedUnlock&);
};


} // namespace Poco


#endif // Foundation_ScopedUnlock_INCLUDED
